FEARLESS Saudi Arabia does not care if it angers the White House after severing ties with Iran, according to a senior source.

The insider said Saudi does not care if it angers the White House after severing ties with Iran

The Saudis cut diplomatic ties with Iran over the storming of its embassy in Tehran early on Sunday morning.

Furious Iranian protesters stormed the building leaving a trail of destruction in their wake after the Sunni kingdom executed prominent Shia cleric Sheikh Nimr al-Nimr and three other Shi'ites along with dozens of al Qaeda members.

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Nimr was considered a terrorist by Riyadh but hailed in Iran as a champion of the rights of Saudi Arabia's marginalised Shia Muslim minority.

The insider said: “Enough is enough. Again and again Tehran has thumbed their nose at the West.

“They continue to sponsor terrorism and launch ballistic missiles and no one is doing anything about it.

“The Saudis really don't care if they anger the White House."

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Crowds of protestors stormed the embassy in Tehran

But Washington has urged diplomatic engagement between the embattled countries, calling on other countries in the region to actively help reduce the rising tensions.

A US official said: “We believe that diplomatic engagement and direct conversations remain essential in working through differences and we will continue to urge leaders across the region to take affirmative steps to calm tensions.”

The chilling warning comes just days after Iran threatened to destroy Saudi Arabia with a “harsh revenge” over the execution.